Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11145 Tube Assy, System Outlet, SDS Price on request CTS-10724 Injector Needle Price on request CTS-5559 Priming Syringe Needle Price on request